Load Specifications
Load data in caliber 6.5-06 Ackley Improved with .264 | 121gr | SUS-TAC LRT bullet and 96 powders. The key underlying parameters are shown in the table above. The recommended powders for this cartridge and bullet combination are Alliant Reloder-26, ReloadSwiss RS 70 and Alliant Reloder-17.
Important Notice: DO NOT go below Minimum Charge or above Maximum Charge. Since we have no control over the equipment and components used, any responsibility and liability for the results achieved is rejected.
Only powders/loads that match the current filter criteria are displayed: max pressure of a load ≤ 90% of max. standardized pressure, fill rate ≥ 80% and propellant combustion ≥ 95%. Use the sliders above the tables to adjust these thresholds.
Charge: Powder weight in grains. Start with the minimum load and work up carefully.
FR (Fill Rate): Case fill as a percentage. Values above 100% mean compressed loads.
MaxP / %: Maximum chamber pressure in bar and as a percentage of the standardized maximum for this caliber.
V(0): Muzzle velocity in feet per second (fps) at the standardized barrel length.
z (Powder Burn): Estimated propellant combustion percentage at bullet exit.
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You can find more information in our FAQ: How can I use the Personalized Load Calculator?
Max Load - Barrel Length: 24"
| Powder | Charge | FR | MaxP | % | V(0) | z |
|---|---|---|---|---|---|---|
| Accurate 2495 | <<locked>> | 82% | 56,695 psi | 87% | 2897 fps | 100% |
| Accurate 2700 | <<locked>> | 84% | 57,725 psi | 89% | 2972 fps | 99% |
| Accurate 3100ᴾ | <<locked>> | 100% | 56,014 psi | 86% | 3015 fps | 99.7% |
| Accurate 4064 | <<locked>> | 84% | 57,014 psi | 88% | 2956 fps | 100% |
| Accurate 4350 | <<locked>> | 92% | 58,247 psi | 90% | 3071 fps | 100% |
| Accurate MAGPROᴾ | <<locked>> | 100% | 58,595 psi | 90% | 3169 fps | 96.7% |
| ADI AR 2208 | <<locked>> | 86% | 56,971 psi | 88% | 2989 fps | 100% |
| ADI AR 2209 | <<locked>> | 96% | 55,259 psi | 85% | 3054 fps | 98.1% |
| ADI AR 2213ᴾ | <<locked>> | 100% | 56,826 psi | 87% | 3114 fps | 97.3% |
| Alliant Power Pro 2000-MR | <<locked>> | 82% | 56,463 psi | 87% | 3117 fps | 100% |
| Alliant Reloder- TS 15.5 | <<locked>> | 86% | 57,798 psi | 89% | 3012 fps | 100% |
| Alliant Reloder-15 | <<locked>> | 84% | 58,146 psi | 89% | 3038 fps | 100% |
| Alliant Reloder-16 | <<locked>> | 94% | 58,595 psi | 90% | 3127 fps | 100% |
| Alliant Reloder-17 | <<locked>> | 88% | 56,550 psi | 87% | 3094 fps | 100% |
| Alliant Reloder-19 | <<locked>> | 98% | 58,392 psi | 90% | 3104 fps | 98.6% |
| Alliant Reloder-22ᴾ | <<locked>> | 100% | 55,912 psi | 86% | 3107 fps | 98.4% |
| Alliant Reloder-23ᴾ | <<locked>> | 100% | 52,808 psi | 81% | 3035 fps | 100% |
| Alliant Reloder-25ᴾ | <<locked>> | 100% | 45,716 psi | 70% | 2953 fps | 99.3% |
| Alliant Reloder-26 | <<locked>> | 98% | 56,797 psi | 87% | 3179 fps | 100% |
| Bofors RP15ᴾ | <<locked>> | 100% | 51,082 psi | 79% | 3025 fps | 97.4% |
| Bofors RP3 | <<locked>> | 84% | 55,187 psi | 85% | 2976 fps | 100% |
| Bofors RP5ᴾ | <<locked>> | 100% | 55,912 psi | 86% | 3107 fps | 98.4% |
| Bofors RP7 | <<locked>> | 90% | 58,088 psi | 89% | 3018 fps | 99.2% |
| Hodgdon H380 | <<locked>> | 84% | 55,434 psi | 85% | 2992 fps | 100% |
| Hodgdon H414 | <<locked>> | 90% | 56,492 psi | 87% | 3064 fps | 99.4% |
| Hodgdon H4350 | <<locked>> | 88% | 55,956 psi | 86% | 3022 fps | 98.5% |
| Hodgdon H4831 | <<locked>> | 98% | 56,985 psi | 88% | 3051 fps | 96.6% |
| Hodgdon H4831 SC | <<locked>> | 98% | 55,666 psi | 86% | 3031 fps | 96.4% |
| Hodgdon Hybrid 100V | <<locked>> | 94% | 55,521 psi | 85% | 2995 fps | 100% |
| Hodgdon LEVERevolution | <<locked>> | 82% | 56,710 psi | 87% | 3028 fps | 100% |
| Hodgdon Retumboᴾ | <<locked>> | 100% | 44,672 psi | 69% | 2982 fps | 96.6% |
| Hodgdon Superformance | <<locked>> | 90% | 56,913 psi | 88% | 3104 fps | 99.3% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 36,448 psi | 56% | 1877 fps | 100% |
| Hodgdon VARGET | <<locked>> | 82% | 57,072 psi | 88% | 2989 fps | 100% |
| IMR 4064 | <<locked>> | 84% | 56,202 psi | 86% | 2969 fps | 100% |
| IMR 4166 Enduron | <<locked>> | 82% | 55,419 psi | 85% | 2953 fps | 99.2% |
| IMR 4350 | <<locked>> | 92% | 55,564 psi | 86% | 2995 fps | 98.9% |
| IMR 4451 Enduron | <<locked>> | 88% | 56,202 psi | 86% | 2989 fps | 99.2% |
| IMR 4831 | <<locked>> | 94% | 58,421 psi | 90% | 3058 fps | 100% |
| IMR 4895 | <<locked>> | 82% | 55,869 psi | 86% | 3009 fps | 100% |
| IMR 4955 Enduron | <<locked>> | 98% | 58,378 psi | 90% | 3041 fps | 97.1% |
| IMR 7828 SSCᴾ | <<locked>> | 100% | 54,114 psi | 83% | 3077 fps | 96.8% |
| Lovex S060 | <<locked>> | 82% | 57,638 psi | 89% | 2953 fps | 100% |
| Lovex S062 | <<locked>> | 84% | 56,463 psi | 87% | 2959 fps | 100% |
| Lovex S065 | <<locked>> | 90% | 56,289 psi | 87% | 2986 fps | 99.8% |
| Lovex S070 | <<locked>> | 92% | 57,653 psi | 89% | 3028 fps | 99.5% |
| Lovex S071ᴾ | <<locked>> | 100% | 46,659 psi | 72% | 2861 fps | 98.7% |
| Norma 201 | <<locked>> | 82% | 57,914 psi | 89% | 2976 fps | 100% |
| Norma 202 | <<locked>> | 82% | 58,523 psi | 90% | 2966 fps | 100% |
| Norma 203B | <<locked>> | 84% | 57,435 psi | 88% | 3022 fps | 100% |
| Norma 204 | <<locked>> | 92% | 56,347 psi | 87% | 3048 fps | 98.1% |
| Norma MRP | <<locked>> | 98% | 55,303 psi | 85% | 3130 fps | 99.3% |
| Norma URP | <<locked>> | 92% | 56,579 psi | 87% | 3051 fps | 100% |
| Ramshot Big Game | <<locked>> | 84% | 58,247 psi | 90% | 3045 fps | 100% |
| Ramshot Grandᴾ | <<locked>> | 100% | 54,462 psi | 84% | 3094 fps | 97.3% |
| Ramshot Hunter | <<locked>> | 92% | 55,347 psi | 85% | 3051 fps | 99.7% |
| Ramshot Magnumᴾ | <<locked>> | 100% | 48,689 psi | 75% | 2963 fps | 97.7% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 37,202 psi | 57% | 1923 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 84% | 55,303 psi | 85% | 2976 fps | 99.5% |
| ReloadSwiss RS 60 | <<locked>> | 86% | 55,999 psi | 86% | 3087 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 92% | 57,957 psi | 89% | 3091 fps | 100% |
| ReloadSwiss RS 70 | <<locked>> | 92% | 56,579 psi | 87% | 3123 fps | 100% |
| ReloadSwiss RS 76ᴾ | <<locked>> | 100% | 44,773 psi | 69% | 2979 fps | 97.8% |
| Rottweil R 902 | <<locked>> | 84% | 58,479 psi | 90% | 2972 fps | 100% |
| Rottweil R 903 | <<locked>> | 86% | 55,376 psi | 85% | 2976 fps | 100% |
| Rottweil R 904 | <<locked>> | 96% | 56,855 psi | 88% | 3022 fps | 97.3% |
| Rottweil R 905 | <<locked>> | 98% | 57,479 psi | 88% | 3087 fps | 98.6% |
| Rottweil R 907 | <<locked>> | 90% | 58,088 psi | 89% | 3018 fps | 99.2% |
| Shooters World Long Rifle | <<locked>> | 90% | 56,289 psi | 87% | 2986 fps | 99.8% |
| Shooters World Precision | <<locked>> | 84% | 56,463 psi | 87% | 2959 fps | 100% |
| Shooters World SW4350 | <<locked>> | 92% | 57,653 psi | 89% | 3028 fps | 99.5% |
| SNPE Vectan SP 11 | <<locked>> | 86% | 56,739 psi | 87% | 3031 fps | 100% |
| SNPE Vectan SP 9 | <<locked>> | 82% | 57,812 psi | 89% | 3005 fps | 100% |
| SNPE Vectan Tubal 3000 | <<locked>> | 82% | 58,421 psi | 90% | 2897 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 86% | 56,043 psi | 86% | 2854 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 90% | 56,101 psi | 86% | 2940 fps | 99.3% |
| SNPE Vectan Tubal 8000 | <<locked>> | 98% | 56,985 psi | 88% | 3081 fps | 98.5% |
| Somchem S335 | <<locked>> | 82% | 58,305 psi | 90% | 2897 fps | 100% |
| Somchem S355 | <<locked>> | 86% | 55,100 psi | 85% | 2966 fps | 100% |
| Somchem S361 | <<locked>> | 96% | 58,784 psi | 90% | 3015 fps | 96.9% |
| Somchem S365 | <<locked>> | 94% | 56,275 psi | 87% | 3058 fps | 100% |
| Somchem S385 | <<locked>> | 98% | 58,363 psi | 90% | 3061 fps | 99.2% |
| Vihtavuori N135 | <<locked>> | 82% | 55,405 psi | 85% | 2881 fps | 100% |
| Vihtavuori N140 | <<locked>> | 82% | 55,695 psi | 86% | 2897 fps | 100% |
| Vihtavuori N150 | <<locked>> | 88% | 56,449 psi | 87% | 2940 fps | 100% |
| Vihtavuori N160 | <<locked>> | 92% | 58,784 psi | 90% | 3045 fps | 100% |
| Vihtavuori N165ᴾ | <<locked>> | 100% | 53,824 psi | 83% | 2976 fps | 98.4% |
| Vihtavuori N540 | <<locked>> | 84% | 57,334 psi | 88% | 2943 fps | 100% |
| Vihtavuori N550 | <<locked>> | 92% | 58,015 psi | 89% | 3051 fps | 100% |
| Vihtavuori N555 | <<locked>> | 98% | 55,390 psi | 85% | 3064 fps | 100% |
| Vihtavuori N560 | <<locked>> | 98% | 55,550 psi | 85% | 3120 fps | 96.7% |
| Winchester 6.5 StaBALL | <<locked>> | 92% | 58,798 psi | 90% | 3012 fps | 100% |
| Winchester 760 | <<locked>> | 90% | 56,782 psi | 87% | 3071 fps | 99.4% |
| Winchester StaBALL HDᴾ | <<locked>> | 100% | 48,008 psi | 74% | 3097 fps | 100% |
| Winchester StaBALL Match | <<locked>> | 82% | 58,044 psi | 89% | 3012 fps | 100% |
| Winchester Supreme 780 | <<locked>> | 98% | 54,839 psi | 84% | 2999 fps | 98% |
Recommended = one of the top powders for this cartridge and bullet combination.
Start Load - Barrel Length: 24"
| Powder | Charge | FR | MaxP | % | V(0) | z |
|---|---|---|---|---|---|---|
| Accurate 2495 | <<locked>> | 80% | 52,953 psi | 81% | 2844 fps | 100% |
| Accurate 2700 | <<locked>> | 80% | 50,691 psi | 78% | 2858 fps | 98% |
| Accurate 3100 | <<locked>> | 86% | 34,766 psi | 54% | 2608 fps | 95.5% |
| Accurate 4064 | <<locked>> | 80% | 50,212 psi | 77% | 2854 fps | 100% |
| Accurate 4350 | <<locked>> | 80% | 38,421 psi | 59% | 2713 fps | 98.3% |
| Accurate MAGPRO | <<locked>> | 98% | 54,621 psi | 84% | 3100 fps | 95.8% |
| ADI AR 2208 | <<locked>> | 80% | 47,268 psi | 73% | 2828 fps | 99.8% |
| ADI AR 2209 | <<locked>> | 88% | 42,496 psi | 65% | 2812 fps | 95% |
| ADI AR 2213 | <<locked>> | 96% | 49,472 psi | 76% | 2979 fps | 95.5% |
| Alliant Power Pro 2000-MR | <<locked>> | 80% | 52,678 psi | 81% | 3054 fps | 100% |
| Alliant Reloder- TS 15.5 | <<locked>> | 80% | 47,892 psi | 74% | 2854 fps | 100% |
| Alliant Reloder-15 | <<locked>> | 80% | 50,966 psi | 78% | 2923 fps | 100% |
| Alliant Reloder-16 | <<locked>> | 80% | 37,318 psi | 57% | 2723 fps | 98.3% |
| Alliant Reloder-17 | 48.6 gr | 80% | 42,482 psi | 65% | 2854 fps | 99.9% |
| Alliant Reloder-19 | <<locked>> | 88% | 42,264 psi | 65% | 2805 fps | 95.1% |
| Alliant Reloder-22 | <<locked>> | 92% | 42,670 psi | 66% | 2858 fps | 95.4% |
| Alliant Reloder-23 | <<locked>> | 80% | 27,441 psi | 42% | 2464 fps | 96% |
| Alliant Reloder-25 | <<locked>> | 90% | 33,315 psi | 51% | 2651 fps | 95.3% |
| Alliant Reloder-26 | 51.1 gr | 82% | 31,618 psi | 49% | 2644 fps | 95.5% |
| Bofors RP15 | <<locked>> | 94% | 42,061 psi | 65% | 2841 fps | 95% |
| Bofors RP3 | <<locked>> | 80% | 48,182 psi | 74% | 2861 fps | 100% |
| Bofors RP5 | <<locked>> | 92% | 42,670 psi | 66% | 2858 fps | 95.4% |
| Bofors RP7 | <<locked>> | 80% | 42,409 psi | 65% | 2730 fps | 96.3% |
| Hodgdon H380 | <<locked>> | 80% | 48,762 psi | 75% | 2881 fps | 99.6% |
| Hodgdon H414 | <<locked>> | 80% | 40,509 psi | 62% | 2762 fps | 96.3% |
| Hodgdon H4350 | <<locked>> | 80% | 43,221 psi | 67% | 2782 fps | 95.7% |
| Hodgdon H4831 | <<locked>> | 96% | 53,156 psi | 82% | 2989 fps | 95.8% |
| Hodgdon H4831 SC | <<locked>> | 96% | 51,967 psi | 80% | 2969 fps | 95.5% |
| Hodgdon Hybrid 100V | <<locked>> | 80% | 34,882 psi | 54% | 2612 fps | 98.8% |
| Hodgdon LEVERevolution | <<locked>> | 80% | 53,040 psi | 82% | 2972 fps | 100% |
| Hodgdon Retumbo | <<locked>> | 98% | 42,047 psi | 65% | 2917 fps | 95.6% |
| Hodgdon Superformance | <<locked>> | 80% | 39,465 psi | 61% | 2772 fps | 95.6% |
| Hodgdon TrailBoss | <<locked>> | 80% | 27,238 psi | 42% | 1680 fps | 100% |
| Hodgdon VARGET | <<locked>> | 80% | 53,737 psi | 83% | 2936 fps | 100% |
| IMR 4064 | <<locked>> | 80% | 49,734 psi | 77% | 2864 fps | 100% |
| IMR 4166 Enduron | <<locked>> | 80% | 51,938 psi | 80% | 2894 fps | 98.7% |
| IMR 4350 | <<locked>> | 82% | 40,437 psi | 62% | 2710 fps | 95.7% |
| IMR 4451 Enduron | <<locked>> | 80% | 43,830 psi | 67% | 2762 fps | 97.1% |
| IMR 4831 | <<locked>> | 80% | 36,883 psi | 57% | 2664 fps | 98% |
| IMR 4895 | <<locked>> | 80% | 52,286 psi | 80% | 2953 fps | 100% |
| IMR 4955 Enduron | <<locked>> | 94% | 51,517 psi | 79% | 2927 fps | 95.6% |
| IMR 7828 SSC | <<locked>> | 96% | 47,384 psi | 73% | 2953 fps | 95.1% |
| Lovex S060 | <<locked>> | 80% | 54,331 psi | 84% | 2904 fps | 100% |
| Lovex S062 | <<locked>> | 80% | 50,024 psi | 77% | 2861 fps | 100% |
| Lovex S065 | <<locked>> | 80% | 41,249 psi | 63% | 2710 fps | 97.8% |
| Lovex S070 | <<locked>> | 80% | 39,508 psi | 61% | 2690 fps | 96.2% |
| Lovex S071 | <<locked>> | 90% | 33,765 psi | 52% | 2582 fps | 95.1% |
| Norma 201 | <<locked>> | 80% | 54,230 psi | 83% | 2920 fps | 100% |
| Norma 202 | <<locked>> | 80% | 55,056 psi | 85% | 2917 fps | 100% |
| Norma 203B | <<locked>> | 80% | 50,343 psi | 77% | 2907 fps | 100% |
| Norma 204 | <<locked>> | 84% | 42,902 psi | 66% | 2799 fps | 95% |
| Norma MRP | <<locked>> | 88% | 39,073 psi | 60% | 2808 fps | 95.7% |
| Norma URP | <<locked>> | 80% | 38,159 psi | 59% | 2707 fps | 98.1% |
| Ramshot Big Game | <<locked>> | 80% | 51,053 psi | 79% | 2936 fps | 100% |
| Ramshot Grand | <<locked>> | 96% | 47,094 psi | 72% | 2956 fps | 95.3% |
| Ramshot Hunter | <<locked>> | 80% | 37,173 psi | 57% | 2694 fps | 96.2% |
| Ramshot Magnum | <<locked>> | 96% | 42,134 psi | 65% | 2828 fps | 95.9% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 27,746 psi | 43% | 1719 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 80% | 48,544 psi | 75% | 2858 fps | 98.7% |
| ReloadSwiss RS 60 | <<locked>> | 80% | 45,107 psi | 69% | 2910 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 80% | 38,363 psi | 59% | 2733 fps | 98% |
| ReloadSwiss RS 70 | 49.4 gr | 80% | 37,173 psi | 57% | 2740 fps | 97.3% |
| ReloadSwiss RS 76 | <<locked>> | 96% | 38,841 psi | 60% | 2831 fps | 95.5% |
| Rottweil R 902 | <<locked>> | 80% | 51,851 psi | 80% | 2874 fps | 100% |
| Rottweil R 903 | <<locked>> | 80% | 45,382 psi | 70% | 2808 fps | 100% |
| Rottweil R 904 | <<locked>> | 90% | 46,992 psi | 72% | 2851 fps | 95.1% |
| Rottweil R 905 | <<locked>> | 90% | 44,077 psi | 68% | 2844 fps | 95.8% |
| Rottweil R 907 | <<locked>> | 80% | 42,409 psi | 65% | 2730 fps | 96.3% |
| Shooters World Long Rifle | <<locked>> | 80% | 41,249 psi | 63% | 2710 fps | 97.8% |
| Shooters World Precision | <<locked>> | 80% | 50,024 psi | 77% | 2861 fps | 100% |
| Shooters World SW4350 | <<locked>> | 80% | 39,508 psi | 61% | 2690 fps | 96.2% |
| SNPE Vectan SP 11 | <<locked>> | 80% | 46,731 psi | 72% | 2867 fps | 99.9% |
| SNPE Vectan SP 9 | <<locked>> | 80% | 54,201 psi | 83% | 2953 fps | 100% |
| SNPE Vectan Tubal 3000 | <<locked>> | 80% | 54,882 psi | 84% | 2848 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 80% | 46,528 psi | 72% | 2713 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 80% | 40,364 psi | 62% | 2651 fps | 96.4% |
| SNPE Vectan Tubal 8000 | <<locked>> | 90% | 43,671 psi | 67% | 2838 fps | 95.7% |
| Somchem S335 | <<locked>> | 80% | 54,665 psi | 84% | 2848 fps | 100% |
| Somchem S355 | <<locked>> | 80% | 45,614 psi | 70% | 2805 fps | 100% |
| Somchem S361 | <<locked>> | 92% | 51,663 psi | 80% | 2900 fps | 95.4% |
| Somchem S365 | <<locked>> | 80% | 34,737 psi | 53% | 2664 fps | 99.7% |
| Somchem S385 | <<locked>> | 86% | 39,421 psi | 61% | 2713 fps | 95.3% |
| Vihtavuori N135 | <<locked>> | 80% | 52,011 psi | 80% | 2831 fps | 100% |
| Vihtavuori N140 | <<locked>> | 80% | 52,127 psi | 80% | 2844 fps | 100% |
| Vihtavuori N150 | <<locked>> | 80% | 43,584 psi | 67% | 2733 fps | 100% |
| Vihtavuori N160 | <<locked>> | 80% | 39,523 psi | 61% | 2707 fps | 98.4% |
| Vihtavuori N165 | <<locked>> | 92% | 41,350 psi | 64% | 2746 fps | 95.5% |
| Vihtavuori N540 | <<locked>> | 80% | 50,662 psi | 78% | 2841 fps | 100% |
| Vihtavuori N550 | <<locked>> | 80% | 39,204 psi | 60% | 2710 fps | 98.1% |
| Vihtavuori N555 | <<locked>> | 80% | 30,327 psi | 47% | 2546 fps | 96.2% |
| Vihtavuori N560 | <<locked>> | 96% | 51,837 psi | 80% | 3051 fps | 95.9% |
| Winchester 6.5 StaBALL | <<locked>> | 80% | 38,827 psi | 60% | 2677 fps | 99.7% |
| Winchester 760 | <<locked>> | 80% | 40,509 psi | 62% | 2762 fps | 96.3% |
| Winchester StaBALL HD | <<locked>> | 82% | 26,020 psi | 40% | 2497 fps | 95.8% |
| Winchester StaBALL Match | <<locked>> | 80% | 54,360 psi | 84% | 2959 fps | 100% |
| Winchester Supreme 780 | <<locked>> | 92% | 44,324 psi | 68% | 2812 fps | 95.6% |
Recommended = one of the top powders for this cartridge and bullet combination.
ᴾ possible press load - work up slowly to this load while watching for signs of excessive pressure.
This overview compares 102 powders for 6.5-06 Ackley Improved loaded with the .264 | 121gr | SUS-TAC LRT. Alliant Reloder-26 delivers the highest muzzle velocity at 3,179 fps; across all powders the maximum-charge window runs from 1,877 fps to 3,179 fps. Accurate 3100 gives the best case fill at 100 %, and 102 of the 102 powders fall inside the usable 80–100 % fill window.
Relative to the caliber's maximum pressure (448 MPa), the top charges use 56–90 %, leaving at least 10 % headroom. The 121.0 gr projectile in 0.264" calls for a 1:8.0 twist; slower twists will usually not stabilise this weight. Accurate 3100, Accurate MAGPRO, ADI AR 2213 reach 100 % fill or more at maximum charge, so these are compressed loads: they need a long drop tube to seat cleanly and react sensitively to the case capacity of your own brass lot. Alliant Reloder-26, ReloadSwiss RS 70, Alliant Reloder-17 rank at the top here: for 6.5-06 Ackley Improved with the .264 | 121gr | SUS-TAC LRT they combine a high case fill with complete burn and sit in the upper velocity band. As outliers, ADI AR 2217, ADI AR 2225, Baschieri & Pellagri 109 burn incompletely and react more sensitively to barrel length and temperature. Always begin at the start load and work up in small increments while checking case and primer for pressure signs.